Means for making ice cream



1. MCA. LONG. MEANS FOR MAKING ICE CREAM. APPLlCATlDNlflLED JULY 9, 1921.

Patented May 30, 1922.

imitan stares JGHN MCAULXFFE LONG, OF MANCHESTER, ENGLAND.

MEANS FOR MAKNC-r ICE C Application. filed. July 9, 1921.

To all whom t may concern Be it known that l, JOHN Motumrrn Lone, subject of the Kingof Great Britain, and residing at Guildhall Chambers, Lloyd Street, Manchester, England, have invented new and useful improvements in hleans for Makingl lloe Cream, of which. the following .is a specification.

rlhis invention comprises improvements in means for makingI ice cream and similar frozen or partially frozen foodstuffs.

The most general method of maltingr ice cream and the like at present in use is to place the cream in a receptacle which is surrounded by a freezing mixture, such as ice and salt, and to stir the substance during; the freezing process by hand or by driven paddles or beaters. This method is slow and means heavy Work.

Another method is to rotate a drum or cylinder containing the freezing mixture, with the drum surface dipping into a receptacle for the cream. so that it takes up a relatively thin layer and rapidly freezes it. In this case a scraper rests or is pressed against the drum or cylinder to remove the frozen cream from the drum and deliver it outside th@ aymaratus. This inetl'iod is not suitable for makingl more than a small amount of .ice cream, as Whilst it is very rapid in freezing a small quantity, it has the disadvantage that the frozen cream de-- livered in this way into an outside receptacle. tends to melt rapidly: and it has also the further disadvantage of a very unequal freezing` of the cream so that the finished product is not smooth. and of the same consistency all through.

Both the above described methods are liable to this defect, in fact.

ln my invention l arrange for the whole of the substance to'be treated (e. cream) to be thoroughly and constantly worked during` the freezing' process, so that a perfectly smooth and consistent product is the result. and I arrange for the Whole of the cream to pass over and around the contour of the container for the freezinpn'iixture so to get the more rapid action for the whole body, vvhich was aimed at in the rotating, drum method by a partial treatment.

I am thus able to obtain a. smooth high quality product in a very short space of time.

Further, the product is not delivered out of the apparatus as Ait is made. as in other drum type machines, but may be left in Specification of Letters Patent.

EAM.

Patented May 30.1922.

serial No. 483,640.

the apparatus .for a considerable time and yvill retain its condition so that after making, it may be stored until required for use.

.an example of a suitable apparatus for carrying out the invention is shown in the appended drawings.

Figure l, is a perspective View of the apparatus With the lid or cover raised.

`liigure 2, is a transverse section.

Figure 3, is a similar vien7 to Figure 2. showing the apparatus in use.

Figure 4, is a. longitudinal section to show one convenient arrangement for mounting' and rotating the cylinder. i

ln this construetional example a is a box having an inner trough-shaped liningo, and any suitable heat insulating material such as cork or the like, indicated by c, in the spaces between the box and the lining. The lining Z), which is preferably metallic is of trough shape in cross section and mounted Within it is a hollou7 cylinder d to contain the freezing mixture. The cylinder is arranged toward one side of the troughshaped lining o so as to leave a relatively large space along one side between the cyl inner and the lining. In this space at a suitable height is arranged a grid or baiiie c which at one edge is preferably in light contact along the contour of the cylinder or is closely adjacent to it. The edge of the grid or bafie e adjacent the cylinder lis preferably continuous, but otherwise the grid is of perforated or any suitable skeleton formation. At least one end of the cylinder is removable for charging ita'vith freezing mixture, and both ends are arranged for cooperating with means in the box, so that the cylinder Ais free to turn, and is connected to a means for turning it. There is no novelty in a rotatable cylindrical container for containing a freezing' mixture, and the method of closing the cylinder and mounting it formsno part of my claim, and may follow on any approved lines. l have shown a. removable end to the cylinder at and at one end of the box a trunnion peg' g on which vthe end of the cylinder is free to turn, and at the other a square or key part It projecting` from a. spindle z', with a closure collar y' Working; in a sleeve in the box. The spindle v1, is rotated by means of a handle 7c and is axially vmovable against a spring m, so that it may be drawn back to permit removal of the cylinder.

Al O

Power may be employed to rotate the cylinder in large sizes of apparatus.

rIhe lining b is arranged to leave a considerable space above the cylinder and I prefer to close the top by a removableplate of glass u, above which ,is the lid c of suitable` depth, and containing insulating ma terial. In use the cream is poured into the apparatus after the cylinder has bee. charged with freezing mixture, and the cylinder is rotated to cause the whole b ody of cream to beworked around in the lining t.'

As there is comparatively little space between the cylinder and the lining., and the lining follows the contour of the cylinder, this effect is rreadily attained. The cream fills thespace beneath the grid orbafie c and is caused to pass through the openings therein, and then 'flows over the cylinder in complete Contact with the walls of same. The repetition of this action works the cream most thoroughly as it rapidly cools and freezes, and givesthe desiredresult. W ith the illustrated apparatus inaction the cream it thickens during freezing, due to the frictionV against Vthe lining en the side opposite the grid c forms a roll as indicated in Figure 3, `which can be trans-- ferredfin the otherside Awhen the cream ready for use, by reversing the cylinder, and can then be bodilyV removed by a suit able bent plate or instrument. The reverse rotation ofthe cylinder brings up practi-iA cally all the cream into a position for removal. Y f

It will be understood that considerablrA modification in the particular constructional form of apparatus is possible, whilst still embodying the spirit of my. invention.

I claim l. In a freezing` machine, a vessel for holdingthe material to be frozen having a ble cylinder for holding the freezing mate rial journaled in the said chamber and arn ranged with its periphery adjacent to one side of the upper part of the said curved lowerpart, an angular' space bein@ formed between the cylinder and the remainder of the curved lower part, and scraper secured in the upper part of the said angular space. n

2. In a freezing machine, a vessel for holding the material to be frozen having a curved trough-shaped lower part, a revoluble cylinder for holding the freezing material journaled adjacent to and substantially concentric with one side portion of the said curved lower part, a downwardly and rearwardly converging` space being formed between the remainder of the curved lower part andthe cylinder, land a scraper secured in the upper part of the said space.

3. In a freezing machine, a vessel for holding theV substance to be frozen having a curved trough-shaped lower part, a. reve'A luble cylinder for holding the freezingl sulr stance journaled inthe said chamber and arranged with its periphery adjacentto one side of the upper part of the said curved lower part, an angular space beingformcd between thercylinder and the remainder ci the curvedv lower part, and a perforated scraper secured -in the upper part of the said angular space so that the substance to betreated is causedbto be propelled around and around in the chamber and causer to pass through the perforation of the scraper into the space above the scraper and cylinder.

In testimony whereof-I afIiX my signature in presence of two witnesses.

' JOHN MCAULIFFE L )N ir. l/Vitnesses WM. HY. SAYKEs, VNuman MILLINGTON. 

